Making the most of waste heat

Can heat pumps be used to upgrade waste heat to 200 degrees? “No problem – in theory”, say researchers.



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Photo: Christina Benjaminsen


The project has been given the name HeatUp, and has attracted a number of industrial partners including Statoil, Statkraft, Tine, Vedde AS, Hydro and Mars Petcare, to mention just a few.

“It was quite a battle to get to participate in this Research Council of Norway-funded project”, says energy researcher Michael Bantle at SINTEF. He is one of the researchers who will now be looking into what literally could turn out to be a real energy boost for Norwegian industry.

“The reason for the interest probably lies in a common realisation that coal, oil and gas are finite resources that also have a negative impact on global climate”, says Bantle. “This is why we’re trying to find new technologies that can replace, at least in part, the energy derived from fossil fuel combustion. “We simply can’t continue to squander our oil, gas, coal and electricity resources when we have an opportunity to replace them with environmentally-friendly alternatives such as waste heat”, he says.

Currently, oil, gas and electricity are all used for heating in a number of industrial processes. If heat pumps can be used instead, this will provide a long-awaited environmental boost and a greening of the bottom line.

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Energie uit vliegers moet missies Defensie verduurzamen

Afbeeldingsresultaat voor foto krijgsmacht wikipedia
Kitepower, een bedrijf dat energie opwerkt met behulp van vliegers, heeft een innovatiecompetitie van het Ministerie van Defensie gewonnen.

De gepatenteerde technologie van Kitepower moet een alternatief bieden voor windturbines. “Vliegers verbruiken 90 procent minder materiaal en zijn twee keer efficiënter”, zegt Kitepower.

De vlieger, met de grond verbonden via een lichtgewicht lijn, vliegt op een zodanige hoogte en manier dat het de wind optimaal moet kunnen vangen. De windkracht wordt vervolgens via een generator op de grond om omgezet in energie.

Het bedrijf uit Delft werd vrijdagmiddag in de Kromhoutkazerne in Utrecht beloond met een ontwikkelopdracht ter waarde van 200.000 euro. Vijf bedrijven stonden in de finale.

Defensie noemt de techniek van de winnaar snel en eenvoudig toepasbaar in een operationele omgeving.

De krijgsmacht is naar eigen zeggen een grootgebruiker van fossiele energie. De afhankelijkheid van deze brandstoffen brengt volgens Defensie risico’s en beperkingen met zich mee die het in de toekomst wil voorkomen.

Mayekawa NH3 heat pump uses lake water to heat Swiss hotel


80% of the heat for the Badrutt Palace Hotel, situated in the heart of the Engadin of the Swiss Alps, is produced by a Mayekawa heat exchange system which uses water from Lake St. Moritz. The system was installed when the hotel projected an overhaul of its existing fossil-fueled heating system in 2006. The project has resulted in a savings of approximately 475,000 liters of heating oil per year, translating into approximately 1200 tons of CO2 emissions saved.

Differing from traditional heat pump systems extracting heat from the air or the ground, this high-performance ammonia HP system by Mayekawa uses lake water as a heat source. By way of a pipeline at the bottom of Lake Moritz, 4°C water is transferred to a heating plant center and released into a separate circuit at 70°C. The water suction inlet is located 50 meters (approx. 165 feet) from the shore and 10 meters (approx. 35 feet) below the lake’s surface. Maximum suction capacity is approx. 4000 liters of water per minute which corresponds roughly to the flow rate of a small stream.

The cycle is complete when the cooled-down water at 1°C is conveyed back into the lake via a second conduit, water quality unchanged. The total conduit is more than 300 meters (approx 985 feet) from the shore and the pipes about 35 meters (approx 115 feet) beneath the water’s surface.

Mayekawa ammonia heat pumps can act as standalone units using a waste water or geothermal heat source, or can be integrated into an existing refrigeration system as a heat recovery application.

Main features and advantages:

  • Uses natural refrigerant NH3 (ammonia)
  • Screw and reciprocating packages available
  • Ammonia and water heat source available
  • Produces hot water up to 85°C
  • Cuts energy costs and reduces CO2 footprint
  • COP ranges from 2.5 to 6 (depending on application conditions)

Making up the energy difference

The Badrutt Palace Hotel is located a chilly 1750 meters above sea level (approx 5750 feet), has a total of 10 floors and nearly 200 rooms to heat. During peak energy usage, three modern oil-fired boilers stand ready for use, and, in addition, excess heat from the hotel’s waste incinerator is redirected efficiently. Waste heat from the flue gases are also recovered and fed into the heating system. All together, these sources supply around one quarter of the hotel’s energy.


The Badrutt Palace Hotel is located a chilly 1750 meters above sea level (approx 5750 feet), has a total of 10 floors and nearly 200 rooms to heat. During peak energy usage, three modern oil-fired boilers stand ready for use, and, in addition, excess heat from the hotel’s waste incinerator is redirected efficiently. Waste heat from the flue gases are also recovered and fed into the heating system. All together, these sources supply around one quarter of the hotel’s energy.

Mayekawa is one of the world leaders and global suppliers of industrial cooling & freezing systems. Mayekawa has been promoting Natural Refrigerants ever since its creation. Over 30.000 famous MYCOM compressor blocks are integrated in air conditioning, chilling, cooling, freezing and heat pumps installations in over 120 countries.

Green Turbine is engaged in a pilot project to utilize waste heat from a digester and turn it into electricity. This also produces heat that can be used. The pilot is being done at  Stichtse Rijnlanden in Nieuwegein and will last about a year. For more questions mail to






Trainee Harm van der Velden takes job at Green Turbine

We, as the GT team, are very happy to hear that our intern technical student Harm van der Velden has accepted a job with GT and AE Magnetics.

Harm van der Velden has has been assisting Green Turbine for several months with the technical development of the steam turbines. Last month he graduated veru successfully his study Thermodynamics with a high final mark of 8,5.

Harm was a master student Mechanical Engineering at the The Technical University in Eindhoven. His master master thesis presentation was called: Performance Verification of a Double Steam Turbine for Electricity Generation” a study about the Waste Heat Recovery Applications with the GT.

He liked his internship very much: “I have chosen this study because I’m very interested in Thermodynamics. But unfortunately I could nof find a internship for there are too little companies where I could graduate in my case. Now I saw my opportunity at Green Turbine which is specialised in waste heat recovery with steam turbines.”

The team of Green Turbine is very proud of Harm and wish him success with his future work.

Harm’s scription is available for customers, so if you’re interested let us know : mail to

Stagiair Harm van der Velden blijft Green Turbine assisteren

Wij als team van Green Turbine, zijn heel blij dat stagiair Harm van der Velden  heeft besloten ons te blijven helpen bij het verder ontwikkelen en bouwen van onze kleine stoomturbines.

Harm werkte al enige maanden als stagiair bij AE Magnetics te Sprang Capelle. Verleden maand  heeft hij zijn afstudeerperiode succesvol afgerond met een  cijfer 8,5. Harm gaat nu bij AE Magnetics BV aan de slag, maar heeft ook besloten Green Turbine te blijven assisteren bij de verdere ontwikkeling.

Harm van der Velden was a master student Mechanical Engineering aan de TU in Eindhoven. Hij is afgestudeerd met een stage en scriptie over het Green Turbine Waste Heat Recovery System bij AE Magnetics BV  in samenwerking met Green Turbine.

De naam van zijn scriptie is: Performance Verification of a Double Steam Turbine for Electricity Generation in waste heat recovery applications. De afstudeerscriptie is exclusief voor klanten beschikbaar en op te vragen bij Green Turbine BV.

Harm vond zijn stage erg leuk en interessant. “Ik heb gekozen voor een studie Thermodynamica maar er zijn niet zoveel bedrijven in Nederland waarbij ik kon afstuderen. Nu met Green Turbine zag ik mijn kans.”

Het team van Green Turbine is heel trots op Harm en wenst hem heel veel succes toe!

Eight maritime innovators to pitch at SMM in Hamburg

Over 2100 exhibitors presenting their innovation in the maritime sector will gather in Hamburg from 6th until 9th September 2016 at theSMM, the leading maritime trade fair held regularly every two years. SME Instrument will be present with eight most innovative companies in the field.


Our champions will introduce their work and plans in a short pitch, so dont miss the unique opportunity to meet them on Thursday 8th September at 5:15 pm, Hall B7, Room B7.1 at the Hamburger Messe. SMM covers the whole of the value chain of the maritime industries, bringing together the decision makers from all parts of the world, as a platform for innovation. More than 50 thousand visitor are expected.

Innovo is an independent manufacturing and engineering company from UK.  It provides high value professional services and high technology equipment for subsea telecommunication, offshore renewables, oil & gas and marine business scenarios.

Sup4Nav is a spin-off company of Maritime University of Szczecin, Poland, with the aim to offer best support for navigation.

Bepart BV is a company from the Netherlands that specialises in developing and manufacturing small steam turbines. Their project Green Turbine WHR System is linked to the development of a Waste Heat Recovery System that converts flue gasses of a diesel-, gas- or fuel cell engine into electricity. With this product Bepart focusses on the shipping market and its suppliers.

UAB Medium Group is a Lithuanian company in the field of design and development of transport control and monitoring systems.

Optixmarine AB is a Swedish company specialised in marine powertrain efficiency. Their team of experienced experts for ship optimisation developed a patent pending gearbox “Optixdrive” – allowing lower fuel consumption with up to 25% for ships with shaft generator.Optixmarine exhibits on SMM in Hamburg 6-9 September in Hall B3.OG stand 113.

Croatian SME TEMA Automatizacija u industriji d.o.o. is manufacturing premium efficiency motors and generators in permanent magnet technology in power range from 10W – 1200KW per unit.

Promatech Maritime Technologies, founded in 2010 in Istanbul, is a leading R&D and innovation focused SME developing disruptive software and engineering solutions for the maritime and shipbuilding industry.This website is not accessible

Rovalma is a technological leader in the field of development and supply of advanced materials. Rovalma is the inventor of high thermal conductivity tool steels and other advanced tool solutions for highly demanding application.




How will climate policy affect energy access goals?




Stringent climate policies would increase the cost of fossil fuels, including those used for the cleaner burning stoves (such as kerosene, liquefied petroleum gas, electricity, and piped gas) that are slowly replacing traditional cooking fuels. Without simultaneous targeted efforts to increase funding for energy access, many who would otherwise have been able to switch from traditional solid fuels to modern cooking fuels would no longer be able to afford the switch, according to a study published in the first issue of the new journal Nature Energy.



Currently, three billion people worldwide rely on solid fuels such as firewood, charcoal, coal, and dung for cooking. Burning these types of fuels, especially indoors, is a major source of air pollution, and is estimated to lead to 4.3 million premature deaths each year. The Sustainable Development Goals have set a target of achieving universal access to modern energy by 2030–but at the same time they call for urgent action to combat climate change.

“There is a lot of pressure on developing countries to take action on climate change. But there has not been much research on how these two policy goals interact,” says IIASA researcher Shonali Pachauri, who led the study. “We wanted to find out if there are trade-offs, and if so, how can we design policies that get around this problem?”

The new study focused on South Asia, where an estimated 72% of the population still relies on solid fuels for cooking. It shows that on the current trajectory, by 2030 that number could be reduced to 727 million (35% of the population). But with climate policies and no complementary energy access policies, the study shows, an additional 336 million people who would have otherwise switched to modern fuels will be unable to afford the switch.

The researchers relied on “Access,” a residential fuel choice model and the IIASA Model for Energy Supply Strategy Alternatives and their General Environmental Impact (MESSAGE) to evaluate four scenarios for climate mitigation at varying levels of policy stringency, each considering a range of subsidies supporting clean fuels or stoves.

“We found that as we increased the carbon price, the detrimental effect on energy access increased disproportionately to the beneficial effect for the climate,” says Colin Cameron, a co-author on the paper.

The study also found that the people most impacted by policies on climate and energy access were neither the poorest nor the richest, but rather those slightly above the poverty line but for whom energy access may be just out of reach.


The good news is that energy access subsidies could offset the negative effects of rising fuel costs spurred by climate policy. However, the study found a broad range of costs for energy access subsidies with similar impacts. The most efficient subsidies, according to the researchers, were those that focused on supporting cook-stove purchases along with fuel bills. Pachauri explains, “For many people, the initial investment in a stove is just too big. Getting over that hurdle may be the push many people need to make the switch to clean-burning fuels.”

Solar And Wind Power For The Eiffel Tower

UGE International Ltd. has installed two on-site wind turbines on the Eiffel Tower as part of a major renovation to the first floor of the iconic structure.

The two UGE VisionAIR5 wind turbines will produce 10,000 kilowatt hours annually, enough to power the commercial areas of the Eiffel Tower’s first floor.

The vertical-axis VisionAIR5 turbine has a height of 5.2m and a width of 3.2m. It has a cut in wind speed of 3.5 m/s and a survival wind speed of 50 m/s. UGE says the VisionAIR5 has been designed for a service life of at least 20 years and is ‘quieter than a human whisper’.

“The Eiffel Tower is arguably the most renowned architectural icon in the world, and we are proud that our advanced technology was chosen as the Tower commits to a more sustainable future,” said Nick Blitterswyk, CEO of UGE. “When visitors from around the world see the wind turbines, we get one step closer to a world powered by clean and reliable renewable energy.”

In addition to wind power, the first floor renovation also included LED lighting and a solar hot water system mounted on Ferrié Pavilion; the output of which will supply approximately 50% of the water heating needs of the first floor’s two pavilions.

A rainwater recovery system has also been installed to provide flushing water for toilet facilities.

High-performance heat pumps have been integrated to improve temperature control and glazing has been used to reduce summer solar heat gain by more than 25%, reducing air conditioning related energy consumption.

The renovation project was the most ambitious Eiffel Tower refurbishment in nearly 30 years.

Tour Eiffel Wikimedia Commons.jpg

Tower trivia

The Eiffel Tower was constructed in 1889 as the entrance arch to the 1889 World’s Fair. At 324 metres, it’s the tallest structure in Paris and was the tallest man-made structure in the world until 1930. The iron in the Eiffel Tower weighs 7,300 tonnes and the entire structure is approximately 10,000 tonnes. Holding together the iron latticework are 2.5 million rivets.

As with the Sydney Harbour Bridge, painting is a major maintenance task. 60 tonnes is used for every 7 year repaint.

More than a quarter of a billion people have visited the Eiffel Tower since it was opened.

Harnessing the Sun’s Energy for Water and Space Heating

The pace of solar energy development is accelerating as the installation of rooftop solar water heaters takes off. Unlike solar photovoltaic (PV) panels that convert solar radiation into electricity, these “solar thermal collectors” use the sun’s energy to heat water, space, or both.


20110504-RD-LSC-0621 - Flickr - USDAgov.jpg

China had an estimated 168 million square meters (1.8 billion square feet) of rooftop solar thermal collectors installed by the end of 2010 — nearly two thirds of the world total. This is equivalent to 118,000 thermal megawatts of capacity, enough to supply 112 million Chinese households with hot water. With some 5,000 Chinese companies manufacturing these devices, this relatively simple low-cost technology has leapfrogged into villages that do not yet have electricity. For as little as $200, villagers can install a rooftop solar collector and take their first hot shower. This technology is sweeping China like wildfire, already approaching market saturation in some communities. Beijing’s goal is to reach 300 million square meters of rooftop solar water heating capacity across the country by 2020, a goal it is likely to exceed.

Other developing countries such as India and Brazil may also soon see millions of households turning to this inexpensive water heating technology. Once the initial installment cost of rooftop solar water heaters is paid back, the hot water is essentially free.

In Europe, where energy costs are relatively high, rooftop solar water heaters are also spreading fast. In Austria, 15 percent of all households now rely on them for hot water. Germany is also forging ahead. Some 2 million Germans are now living in homes with rooftop solar systems. Roughly 30 percent of the installed solar thermal capacity in these two countries consists of “solar-combi-systems” that are engineered to heat both water and space.

The U.S. rooftop solar water heating industry has historically concentrated on a niche market — selling and marketing more than 9 million square meters of solar water heaters for swimming pools between 1995 and 2005. Given this base, the industry was poised to mass-market residential solar water and space heating systems when federal tax credits were introduced in 2006. Led by Hawaii, California, and Florida, annual U.S. installations of these systems have more than tripled since 2005.

Despite the recent growth in U.S. installations, the country ranks 36th in installed capacity relative to its population, with just 0.01 square meters installed per person. Cyprus, on the other hand, currently leads the world in solar water heater area on a per capita basis, with 0.79 square meters per person. Israel ranks second with 0.56 square meters per person.

Inspired by the rapid adoption of rooftop water and space heaters in Europe in recent years, the European Solar Thermal Industry Federation (ESTIF) has established an ambitious goal of one square meter of rooftop collector for every European by 2020. Over the long term, ESTIF estimates that solar thermal has the potential to meet most of the region’s low-temperature heating needs
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£310m invested in UK wind turbines

Manufacturing giant Siemens and the UK’s Associated British Ports are to invest a total of £310m in UK wind turbine factories, creating 1,000 jobs.

Siemens will put up £160m – doubling its previous plans to invest £80m in wind turbine production in the UK.

The investment is being made across two locations – the Green Port project in Hull, and a second manufacturing facility in Paull in East Yorkshire.

Siemens said the UK “recognises the potential of offshore wind energy”.

“We invest in markets with reliable conditions that can ensure that factories can work to capacity,” said Michael Suess, head of Siemens’s energy sector.

“The British energy policy creates a favourable framework for the expansion of offshore wind energy. In particular, it recognises the potential of offshore wind energy within the overall portfolio of energy production.”

Associated British Ports, which is collaborating with Siemens on the Green Port development in Hull, is investing £150m in the project.

The combined investment of £310m is expected to create up to 1,000 jobs directly – 300 more than previously announced – plus additional jobs in construction and through the supply chain.

The Green Port facility will construct, assemble and service offshore wind turbines, while the second Siemens site in Paull will be used to manufacture the 75-metre rotor blades.

Energy Secretary Ed Davey said the investment demonstrated the UK was “backing enterprise with better infrastructure and lower taxes”.

“This deal is excellent news for the people of Hull and the Humber, the UK, the wind industry, and our energy security,” he said.

Wind power is an efficient means of producing energy, he said.

“Offshore wind is producing 80-85% of the time,” Mr Davey told the BBC. “We are the leading country in the world for offshore (wind) investment,.”

The public is behind wind power, which will “create a huge number of green jobs”, he added.

Lord Chris Haskins, Chair of the Humber Local Economic Partnership told Radio 5 the deal was “a transformational moment for the Humber economy”.